The flag of the City of Verona. is Light blue (B -) charged
with gold (Au) cross. Gianluca Peron, 4 November 2002

Verona is the capital of Verona Province in Veneto. While
visiting this city, I noticed that the flag above old city gates
(photo by Eli Gutterman) and at city hall is 1:2. Dov Gutterman, 15 October 2004

The flag is blue with a yellow cross throughout [1]. The blue
is indeed, as described, a light shade. The proportion of the
flag at the places I have seen it, was 2:3 (perhaps 3:5), never
1:2. I do not know if the width of the cross arms is somewhere
regulated. However, they differed somewhat, between 1/6 and 1/5
of the flag width.
For my image I chose 1/6 and colours similar to the ones shown on
CISV website [2]. These are also pretty close to my own
observations [3].
References:
[1] Vexilla Italica 1991(2): 50
[2] <cisv.it>
[3] Own observations and photographs, 22 - 25 May 2009.Marcus Schmöger, 1 June 2009